Show footnotes inline

[ahmedre]

Previously, footnotes were being removed. This patch updates it so that
footnotes are added inline while reading instead.

[ahmedre]

[ahmedre]

this is a similar approach to what @mohamede1945 did in quran/quran-ios. the nice thing about it is it's simpler. I spent some time thinking about this but unsure about the ux for other approaches (ex having a superscript and clicking shows the footnote - in this case, where do we show it? bottom sheet? dialog? what if the footnote is super short? super long? etc).

[github-actions]

OLD: app-madani-debug.apk (signature: V1, V2)
NEW: app-madani-debug.apk (signature: V1, V2)

          │            compressed            │           uncompressed           
          ├───────────┬───────────┬──────────┼───────────┬───────────┬──────────
 APK      │ old       │ new       │ diff     │ old       │ new       │ diff     
──────────┼───────────┼───────────┼──────────┼───────────┼───────────┼──────────
      dex │  11.8 MiB │  11.8 MiB │ +2.2 KiB │  30.1 MiB │  30.1 MiB │ +5.6 KiB 
     arsc │   1.9 MiB │   1.9 MiB │    +68 B │   1.9 MiB │   1.9 MiB │    +68 B 
 manifest │   5.8 KiB │   5.8 KiB │      0 B │  28.6 KiB │  28.6 KiB │      0 B 
      res │   1.5 MiB │   1.5 MiB │     +2 B │   1.7 MiB │   1.7 MiB │      0 B 
    asset │ 404.2 KiB │ 404.2 KiB │      0 B │ 678.6 KiB │ 678.6 KiB │      0 B 
    other │ 181.2 KiB │ 181.2 KiB │     -2 B │ 365.6 KiB │ 365.6 KiB │      0 B 
──────────┼───────────┼───────────┼──────────┼───────────┼───────────┼──────────
    total │  15.8 MiB │  15.8 MiB │ +2.3 KiB │  34.7 MiB │  34.7 MiB │ +5.7 KiB