feat: Add telemetry opt-in/out buttons to consent page

[spalmurray]

Another Mozilla requirement. Hopefully this is satisfactory.

[codecov]

Bundle Report

Changes will increase total bundle size by 7.12kB (1.11%) ⬆️. This is within the configured threshold ✅

Detailed changes

Bundle name	Size	Change
codecov-browser-extension-array-push	647.47kB	7.12kB (1.11%) ⬆️

Affected Assets, Files, and Routes:

view changes for bundle: codecov-browser-extension-array-push

Assets Changed:

Asset Name	Size Change	Total Size	Change (%)
vendor.js	3.4kB	383.25kB	0.89%
background.js	127 bytes	198.09kB	0.06%
githubFile.js	1.51kB	11.5kB	15.13% ⚠️
githubPR.js	1.35kB	6.67kB	25.48% ⚠️
../consent.html	340 bytes	5.12kB	7.11% ⚠️
../consent.js	389 bytes	1.1kB	54.71% ⚠️

Files in vendor.js:

• ./src/types.ts → Total Size: 931 bytes

• ./src/content/common/sentry.ts → Total Size: 1.1kB

Files in githubFile.js:

• ./src/content/github/common/fetchers.ts → Total Size: 2.44kB

• ./src/content/github/file/main.tsx → Total Size: 11.75kB

Files in githubPR.js:

• ./src/content/github/common/fetchers.ts → Total Size: 2.44kB

• ./src/content/github/pr/main.tsx → Total Size: 6.25kB

[sentry]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ TypeError: Cannot read properties of null (reading... in production

• ‼️ Error: Could not find commit link from short sha in production

• ‼️ TypeError: can't access property "prepend", e is n... in production

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