[PTRun][Docs] Add GitHubRepo and ProcessKiller third-party plugins (#33830)

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fix/what does it change/how was it tested (even manually, if necessary)?
-->
## Summary of the Pull Request

Add [GitHubRepo](https://github.com/8LWXpg/PowerToysRun-GitHubRepo) and
[ProcessKiller](https://github.com/8LWXpg/PowerToysRun-ProcessKiller)

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## PR Checklist

- [ ] **Closes:** #xxx
- [ ] **Communication:** I've discussed this with core contributors
already. If work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end user facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

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wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed

.github/actions/spell-check/allow/names.txt

@@ -28,6 +28,7 @@ videoconference
 
 # USERS
 
+8LWXpg
 Adoumie
 Advaith
 alekhyareddy
@@ -143,6 +144,7 @@ TBM
 tilovell
 Triet
 waaverecords
+Xpg
 ycv
 Yuniardi
 yuyoyuppe

doc/thirdPartyRunPlugins.md

@@ -36,6 +36,8 @@ Contact the developers of a plugin directly for assistance with a specific plugi
 | [WebSearchShortcut](https://github.com/Daydreamer-riri/PowerToys-Run-WebSearchShortcut) | [Riri](https://github.com/Daydreamer-riri) | Select a specific search engine to perform searches. |
 | [UnicodeInput](https://github.com/nathancartlidge/powertoys-run-unicode) | [nathancartlidge](https://github.com/nathancartlidge) | Copy Unicode characters to the clipboard |
 | [PowerHexInspector](https://github.com/NaroZeol/PowerHexInspector) | [NaroZeol](https://github.com/NaroZeol) | Peek other forms of an input number |
+| [GitHubRepo](https://github.com/8LWXpg/PowerToysRun-GitHubRepo) | [8LWXpg](https://github.com/8LWXpg) | Search and open GitHub repositories |
+| [ProcessKiller](https://github.com/8LWXpg/PowerToysRun-ProcessKiller) | [8LWXpg](https://github.com/8LWXpg) | Search and kill processes |
 
 ## Extending software plugins