fix theory image links

Dependencies

• [2] GLUD3ZVF Generating the reference
• [3] MZUWWTJL typo fixes, style and clarity suggestions
• [4] SCSV2FNS Reboot

Change contents

• replacement in src/theory.md at line 8
  [2.533]→[2.533:581](∅→∅)
  − <img src="//pijul.org/img/repos-line-add.svg"/>
  [2.533]

  [2.581]
  + <img src="//pijul.org/manual/repos-line-add.svg"/>
• replacement in src/theory.md at line 18
  [2.1469]→[2.1469:1517](∅→∅)
  − <img src="//pijul.org/img/repos-line-del.svg"/>
  [2.1469]

  [2.1517]
  + <img src="//pijul.org/manual/repos-line-del.svg"/>
• replacement in src/theory.md at line 47
  [2.3384]→[2.3384:3429](∅→∅)
  − <img src="//pijul.org/img/inverse2.svg"/>
  [2.3384]

  [2.3429]
  + <img src="//pijul.org/manual/inverse2.svg"/>
• replacement in src/theory.md at line 54
  [2.3702]→[2.3702:3747](∅→∅)
  − <img src="//pijul.org/img/inverse3.svg"/>
  [2.3702]

  [2.3747]
  + <img src="//pijul.org/manual/inverse3.svg"/>
• replacement in src/theory.md at line 65
  [2.4304]→[2.4304:4356](∅→∅)
  − <img src="//pijul.org/img/known-vertices1.svg"/>
  [2.4304]

  [2.4356]
  + <img src="//pijul.org/manual/known-vertices1.svg"/>
• replacement in src/theory.md at line 71
  [2.4695]→[2.4695:4747](∅→∅)
  − <img src="//pijul.org/img/known-vertices2.svg"/>
  [2.4695]

  [2.4747]
  + <img src="//pijul.org/manual/known-vertices2.svg"/>
• replacement in src/theory.md at line 78
  [2.5271]→[2.5271:5323](∅→∅)
  − <img src="//pijul.org/img/known-vertices0.svg"/>
  [2.5271]

  [2.5323]
  + <img src="//pijul.org/manual/known-vertices0.svg"/>
• replacement in src/theory.md at line 104
  [2.6863]→[2.6863:6907](∅→∅)
  − <img src="//pijul.org/img/pseudo0.svg"/>
  [2.6863]

  [2.6907]
  + <img src="//pijul.org/manual/pseudo0.svg"/>
• replacement in src/theory.md at line 112
  [2.7582]→[2.7582:7626](∅→∅)
  − <img src="//pijul.org/img/pseudo1.svg"/>
  [2.7582]

  [2.7626]
  + <img src="//pijul.org/manual/pseudo1.svg"/>
• replacement in src/theory.md at line 150
  [2.10883]→[2.10883:10935](∅→∅)
  − <img src="//pijul.org/img/new-repos-line-del.svg"/>
  [2.10883]

  [2.10935]
  + <img src="//pijul.org/manual/new-repos-line-del.svg"/>