Create new FMA for Slack for Windows (#35470)

<!-- Add the related story/sub-task/bug number, like Resolves #123, or
remove if NA -->
**Related issue:** Resolves #35471 

# Checklist for submitter

If some of the following don't apply, delete the relevant line.

- [ ] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.

- [ ] Input data is properly validated, `SELECT *` is avoided, SQL
injection is prevented (using placeholders for values in statements)
- [ ] If paths of existing endpoints are modified without backwards
compatibility, checked the frontend/CLI for any necessary changes

## Testing

- [ ] Added/updated automated tests
- [ ] Where appropriate, [automated tests simulate multiple hosts and
test for host
isolation](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/reference/patterns-backend.md#unit-testing)
(updates to one hosts's records do not affect another)

- [ ] QA'd all new/changed functionality manually

For unreleased bug fixes in a release candidate, one of:

- [ ] Confirmed that the fix is not expected to adversely impact load
test results
- [ ] Alerted the release DRI if additional load testing is needed

## Database migrations

- [ ] Checked schema for all modified table for columns that will
auto-update timestamps during migration.
- [ ] Confirmed that updating the timestamps is acceptable, and will not
cause unwanted side effects.
- [ ] Ensured the correct collation is explicitly set for character
columns (`COLLATE utf8mb4_unicode_ci`).

## New Fleet configuration settings

- [ ] Setting(s) is/are explicitly excluded from GitOps

If you didn't check the box above, follow this checklist for
GitOps-enabled settings:

- [ ] Verified that the setting is exported via `fleetctl
generate-gitops`
- [ ] Verified the setting is documented in a separate PR to [the GitOps
documentation](https://github.com/fleetdm/fleet/blob/main/docs/Configuration/yaml-files.md#L485)
- [ ] Verified that the setting is cleared on the server if it is not
supplied in a YAML file (or that it is documented as being optional)
- [ ] Verified that any relevant UI is disabled when GitOps mode is
enabled

## fleetd/orbit/Fleet Desktop

- [ ] Verified compatibility with the latest released version of Fleet
(see [Must
rule](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/workflows/fleetd-development-and-release-strategy.md))
- [ ] If the change applies to only one platform, confirmed that
`runtime.GOOS` is used as needed to isolate changes
- [ ] Verified that fleetd runs on macOS, Linux and Windows
- [ ] Verified auto-update works from the released version of component
to the new version (see [tools/tuf/test](../tools/tuf/test/README.md))

ee/maintained-apps/inputs/winget/slack.json

@@ -0,0 +1,10 @@
+{
+  "name": "Slack",
+  "slug": "slack/windows",
+  "package_identifier": "SlackTechnologies.Slack",
+  "unique_identifier": "Slack",
+  "installer_arch": "x64",
+  "installer_type": "msi",
+  "installer_scope": "machine",
+  "default_categories": ["Communication"]
+}

ee/maintained-apps/outputs/apps.json

@@ -295,6 +295,13 @@
       "unique_identifier": "com.tinyspeck.slackmacgap",
       "description": "Slack is a team communication and collaboration software for modern workplaces."
     },
+    {
+      "name": "Slack",
+      "slug": "slack/windows",
+      "platform": "windows",
+      "unique_identifier": "Slack",
+      "description": "Slack is a team communication and collaboration software for modern workplaces."
+    },
     {
       "name": "Sublime Text",
       "slug": "sublime-text/darwin",
@@ -380,4 +387,4 @@
       "description": "Zoom is a leading video communication platform for meetings, webinars, and collaboration."
     }
   ]
-}
+}

ee/maintained-apps/outputs/slack/windows.json

@@ -0,0 +1,21 @@
+{
+  "versions": [
+    {
+      "version": "4.46.104",
+      "queries": {
+        "exists": "SELECT 1 FROM programs WHERE name = 'Slack' AND publisher = 'Slack Technologies Inc.';"
+      },
+      "installer_url": "https://downloads.slack-edge.com/desktop-releases/windows/x64/4.46.104/slack-standalone-4.46.104.0.msi",
+      "install_script_ref": "8959087b",
+      "uninstall_script_ref": "e4a6ce99",
+      "sha256": "723607a4aaa5f2070d9fc4c3c6a81dcc94eddd20226ca3d28def41190ada0602",
+      "default_categories": [
+        "Communication"
+      ]
+    }
+  ],
+  "refs": {
+    "8959087b": "$logFile = \"${env:TEMP}/fleet-install-software.log\"\n\ntry {\n\n$installProcess = Start-Process msiexec.exe `\n  -ArgumentList \"/quiet /norestart /lv ${logFile} /i `\"${env:INSTALLER_PATH}`\"\" `\n  -PassThru -Verb RunAs -Wait\n\nGet-Content $logFile -Tail 500\n\nExit $installProcess.ExitCode\n\n} catch {\n  Write-Host \"Error: $_\"\n  Exit 1\n}\n",
+    "e4a6ce99": "$product_code = \"{A1A6A7A8-C8CD-43BB-BA72-BBC46362E177}\"\n\n# Fleet uninstalls app using product code that's extracted on upload\n$process = Start-Process msiexec -ArgumentList @(\"/quiet\", \"/x\", $product_code, \"/norestart\") -Wait -PassThru\n\n# Check exit code and output result\nif ($process.ExitCode -eq 0) {\n    Write-Output \"Exit 0\"\n    Exit 0\n} else {\n    Write-Output \"Exit $($process.ExitCode)\"\n    Exit $process.ExitCode\n}\n"
+  }
+}