[docs] Update MinFS documentation

Change-Id: I34b6aa489fd41e36c4449c1b2dd45a289718ebc7

[docs] Remove references to run-zircon-x86-64

Also removes the written constraint that QEMU networking only works on
x64, as it does work on arm64 without any changes.

Change-Id: I625dc5ea2e3a194efde988cd37de5865e53bec76

[zx] Magenta -> Zircon

The Great Renaming is here!

Change-Id: I3229bdeb2a3d0e40fb4db6fec8ca7d971fbffb94

[lsfs] Add option to list underlying block device

Currently only supported for minfs and blobstore.
Added O_ADMIN requirement to access

Change-Id: Ie458449dc70d9820abfc8647103bb0ccc3ad52d3

[docs] Update host-side QEMU MinFS instructions

Change-Id: Iebb21da4acb1755748e58f9403f55415698789a0

[gpt] Make GPT tool more usable; update MinFS instructions

- Remove the "Default block device". On real hardware, magically
updating a potentially random device is a recipe for disaster.
- Add operation to ulib/gpt to query usable range of GPT, so user
does not need to calculate size of metadata themselves.
- Add operation to uapp/gpt to initialize empty gpt, so the range of
the GPT may subsequently be queried.
- Improve uapp/gpt usage description to document tool.
- Update uapp/gpt tool to print all block ranges in decimal,
not hex.
- Update uapp/gpt to add partitions by range (start, end), matching
the range presented by the "dump" command.
- Update MinFS instructions to use less "magic" (no assumptions about
underlying block size), and use the new GPT instructions.

Change-Id: Idbb9f6104d0f9b9d8d6efd685686a29a4e4f7e82

[docs] Make MinFS auto mounting information clearer

Change-Id: I1488c9fd00d3a439a21017bc87d3d1beb31ba61f

[docs] Update MinFS docs

The way we map mount points has changed, update to reflect this.

The way we format devices has also changed, update for this.

Change-Id: I1610e02ca7b8516bdb6aeb10843495857361cc66

[docs] Update MinFS documentation

Change-Id: I17bf073f3370d4b536ea41e716eb0b3bc5a3a820

[docs] Update MinFS instructions to use mount path

Change-Id: Id17ec7d351db5f34c10638ee6927ed464489c62f

[docs] Added MinFS documentation

Change-Id: I9fe15d8105abf463e19ace7a42075a968003145d