fix: move @glimmer/component and @glimmer/tracking in dependencies

[ndekeister-us]

As @glimmer/component and @glimmer/tracking are now used in the addon directory via this commit -> https://github.com/ember-learn/ember-cli-addon-docs/pull/934/files#diff-59d3e78aa5dff5b8d7cdf515b80e1900e1a9fc0440bb3f64a1eb98aa62af2277R1-R2

They need to be moved in dependencies, otherwise we will have this error when using v4 of this repo in an addon/app not having, for example, @glimmer/component in his devDeps / deps ->

$ ember build --environment=production
Environment: production
cleaning up...
Build Error (WebpackBundler)

ember-cli-addon-docs tried to import "@glimmer/component" in "ember-cli-addon-docs/components/docs-hero/index.js" but the package was not resolvable from /Users/nathanaeldek/Projects/ember/ember-exam/node_modules/ember-cli-addon-docs

[ndekeister-us]

ping @rwwagner90, it should not be blocking for a lot of projects because i guess that, now, most Ember apps use @glimmer/component or @glimmer/tracking but for some (like ember-exam) it "blocks" the update to ember-cli-addon-docs@4

[RobbieTheWagner]

Thanks @ndekeister-us!