DOC-1057: Update Nextcloud credentials to medium tier template

[freakwriter]

Incorporate prerequisite in auth methods sections; convert auth methods to detailed numbered instructions; add more info on how to format WebDAV and other URLs.

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Overall readability score: 43.09 (🟢 +0.01)

File	Readability
nextcloud.md	71.67 (🟢 +10.75)

View detailed metrics

🟢 - Shows an _increase_ in readability 🔴 - Shows a _decrease_ in readability File | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- [nextcloud.md](https://github.com/n8n-io/n8n-docs/blob/9b8705cf48f1953f58c34b39945a5dd2bea0eb21/docs/integrations/builtin/credentials/nextcloud.md "docs/integrations/builtin/credentials/nextcloud.md") | 71.67 | 51.85 | 6.5 | 10.7 | 12.33 | 6.07   | 🟢 +10.75 | 🟢 +13.57 | 🟢 +0.48 | 🟢 +0.9 | 🟢 +1.49 | 🟢 +1.33 Averages:   | Readability | FRE | GF | ARI | CLI | DCRS --- | --- | --- | --- | --- | --- | --- Average | 43.09 | 34.81 | 11.67 | 14.88 | 14.37 | 8.54   | 🟢 +0.01 | 🟢 +0.01 | 🟢 +0 | 🟢 +0 | 🟢 +0 | 🟢 +0

View metric targets

Metric | Range | Ideal score --- | --- | --- Flesch Reading Ease | 100 (very easy read) to 0 (extremely difficult read) | 60 Gunning Fog | 6 (very easy read) to 17 (extremely difficult read) | 8 or less Auto. Read. Index | 6 (very easy read) to 14 (extremely difficult read) | 8 or less Coleman Liau Index | 6 (very easy read) to 17 (extremely difficult read) | 8 or less Dale-Chall Readability | 4.9 (very easy read) to 9.9 (extremely difficult read) | 6.9 or less