Seal ghost_var and mnat_own

See merge request iris/iris!571

fix wp_bind with empty context

See merge request iris/iris!579

wp_pures: also handle [WP v]

See merge request iris/iris!578

gmap_view: add some missing validity lemmas

See merge request iris/iris!573

Add `array_init` and corresponding WP specs.

See merge request iris/iris!492

Enforce strict bulleting

Closes #344

See merge request iris/iris!577

Finishes the work started in !563.

Fixes #344

Make bulleting strict for algebra and base_logic

See merge request iris/iris!563

Strengthen persistent_sep_dup for intuitionistic propositions

See merge request iris/iris!556

use Qp inequality instead of frac validity for lemma statements

See merge request iris/iris!558

Remove `bi.tactics`

See merge request iris/iris!566

Include fragment in `mnat_auth_auth`

See merge request iris/iris!569

This gives the following new lemma:

```coq
Lemma mnat_auth_included q n : mnat_auth_frag n ≼ mnat_auth_auth q n.
```

Also reorganize the files slightly so that validity lemmas are grouped together.