Avoid having typos in documentation and codebase

[azzamsa]

Hi, 👋

Are you interested in avoiding typos in the documentation and codebase? I ran typos and found some.

Yes, sometimes it reports false positives, but typos-cli keeps improving, and it is customizable.

If you're okay with it, I'm ready to submit a PR.

error: `adressing` should be `addressing`
  --> ./iroh-net/src/lib.rs:101:53
    |
101 | //! up the [`NodeId`] in the DNS system to find the adressing details.  This enables
    |                                                     ^^^^^^^^^
    |
error: `fileystem` should be `filesystem`
  --> ./iroh-blobs/src/export.rs:40:76
   |
40 | /// Export all entries of a collection, recursively, to files on the local fileystem.
   |                                                                            ^^^^^^^^^
   |
error: `fileystem` should be `filesystem`
  --> ./iroh-blobs/src/export.rs:58:49
   |
58 | /// Export a single blob to a file on the local fileystem.
   |                                                 ^^^^^^^^^
   |
error: `conact` should be `contact`
  --> ./iroh-net/src/endpoint.rs:720:57
    |
720 |     /// known direct addresses, when there was last any conact with this node and what kind
    |                                                         ^^^^^^
    |
error: `environemnt` should be `environment`
  --> ./iroh-net/src/endpoint.rs:1041:31
     |
1041 | /// Read a proxy url from the environemnt, in this order
     |                               ^^^^^^^^^^^
     |
error: `ocurred` should be `occurred`
  --> ./iroh-blobs/src/downloader.rs:90:18
   |
90 |     /// An error ocurred that prevents the request from being retried at all.
   |                  ^^^^^^^
   |
error: `attemps` should be `attempts`
  --> ./iroh-net/src/discovery/pkarr_publish.rs:132:24
    |
132 |         let mut failed_attemps = 0;
    |                        ^^^^^^^
    |
error: `attemps` should be `attempts`
  --> ./iroh-net/src/discovery/pkarr_publish.rs:139:28
    |
139 |                     failed_attemps += 1;
    |                            ^^^^^^^
    |
error: `attemps` should be `attempts`
  --> ./iroh-net/src/discovery/pkarr_publish.rs:143:76
    |
143 |                         .reset(Instant::now() + Duration::from_secs(failed_attemps));
    |                                                                            ^^^^^^^
    |
error: `attemps` should be `attempts`
  --> ./iroh-net/src/discovery/pkarr_publish.rs:145:28
    |
145 |                     failed_attemps = 0;
    |                            ^^^^^^^
    |
error: `adress` should be `address`
  --> ./iroh-net/src/discovery.rs:63:13
   |
63 |     /// The adress info for the node being resolved.
   |             ^^^^^^
   |
error: `substituded` should be `substituted`
  --> ./iroh-net/src/bin/iroh-relay.rs:185:32
    |
185 | /// and can not immediately be substituded by serde.
    |                                ^^^^^^^^^^^

[dignifiedquire]

thanks, would be useful to have it, as long as it doesn't add too many false positives