impr(quotes): add english quotes (@quixaq)

[quixaq]

Description

Added 7 quotes
Quotes added in English:

• To say that "the worker has an interest in the rapid growth of capital", means only this: that the more speedily the worker augments the wealth of the capitalist, the larger will be the crumbs which fall to him, the greater will be the number of workers that can be called into existence, the more can the mass of slaves dependent upon capital be increased.
  - Karl Marx
• Religion is the sigh of the oppressed creature, the heart of a heartless world, and the soul of soulless conditions. It is the opium of the people.
  - Karl Marx
• The proletarians have nothing to lose but their chains. They have a world to win. Workers of All Countries, Unite!
  - Karl Marx
• Without revolutionary theory there can be no revolutionary movement.
  - Vladimir Lenin
• It is natural for a liberal to speak of "democracy" in general; but a Marxist will never forget to ask: "for what class?"
  - Vladimir Lenin
• There are no supreme saviors,
  Neither God, nor Caesar nor tribune;
  Producers, let us save ourselves,
  We decree common salvation!
  - The Internationale
• The state represses, the law cheats,
  Taxes bleed the poor;
  No duties are imposed on the rich,
  The rights of the poor are empty words,
  We have languished long enough under domination,
  Equality wants other laws:
  "No rights without duties," it says
  "Equals, there are no duties without rights."
  - The Internationale

Checks

• Adding quotes?
  • Make sure to follow the quotes documentation
  • Make sure to include translations for the quotes in the description (or another comment) so we can verify their content.
• Adding a language?
  • Make sure to follow the languages documentation
  • Add language to packages/schemas/src/languages.ts
  • Add language to exactly one group in frontend/src/ts/constants/languages.ts
  • Add language json file to frontend/static/languages
• Adding a theme?
  • Make sure to follow the themes documentation
  • Add theme to packages/schemas/src/themes.ts
  • Add theme to frontend/src/ts/constants/themes.ts
  • (optional) Add theme css file to frontend/static/themes
  • Add some screenshots of the theme, especially with different test settings (colorful, flip colors) to your pull request
• Adding a layout?
  • Make sure to follow the layouts documentation
  • Add layout to packages/schemas/src/layouts.ts
  • Add layout json file to frontend/static/layouts
• Adding a font?
  • Make sure to follow the fonts documentation
  • Add font file to frontend/static/webfonts
  • Add font to packages/schemas/src/fonts.ts
  • Add font to frontend/src/ts/constants/fonts.ts
• Check if any open issues are related to this PR; if so, be sure to tag them below.
• Make sure the PR title follows the Conventional Commits standard. (https://www.conventionalcommits.org for more info)
• Make sure to include your GitHub username prefixed with @ inside parentheses at the end of the PR title.